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by tambeb 1630 days ago
A tweet about this very article caught my eye yesterday, and I'm glad HN's taken notice too.

https://twitter.com/JohnFPfaff/status/1477382805583716353?t=...

'For a disease w a 1-in-20,000 risk, a test w a false positive rate of 1% and a false negative rate of 0%—an insanely accurate test—would identify 1 correct case and 200 false positives every time. Or would be wrong 99.5% of the time.

This isn’t “bad tests.” This is… baserates.'